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Click 30 year old male with Cerebrotendinous xanthomatosis (CTX). Sagittal T1 weighted MR images of the ankle show a large T1 hypointense mass occupying the entire Achilles tendon. (TR/TE: 400/10 ms, 3 mm slice thickness, 320x320 matrix)

Click 30 year old male with Cerebrotendinous xanthomatosis (CTX). Axial T2 weighted MR images of the ankle show a large T2 isointense mass occupying the entire Achilles Tendon. (TR/TE: 4380/84 ms, 4 mm slice thickness, 312x384 matrix)

Click 30 year old male with Cerebrotendinous xanthomatosis (CTX). Axial T1 weighted MR images of the brain show areas of low signal intensity in the cerebellum, predominantly in the bilateral dentate nucleus and the cerebellar white matter. There are also T1W hypointense lesions seen in the periventricular white matter. (TR/TE: 565/10 ms, 5 mm slice thickness, 512x408 matrix)

Click 30 year old male with Cerebrotendinous xanthomatosis (CTX). Axial T2 weighted images of the brain show areas of high signal intensity in the cerebellum, predominantly in the bilateral dentate nucleus and the cerebellar white matter. There are also T2W hyperintense lesions seen in the bilateral substantia nigra, bilateral globus pallidus and the posterior limb of internal capsule. There are periventricular white matter hyperintensities also seen. (TR/TE: 3800/91 ms, 5 mm slice thickness, 384x288 matrix)

Click 30 year old male with Cerebrotendinous xanthomatosis (CTX). Coronal T2 weighted images of the brain show areas of high signal intensity in the cerebellum, predominantly in the bilateral dentate nucleus and the cerebellar white matter. There are also T2W hyperintense lesions seen in the bilateral substantia nigra, bilateral globus pallidus and the posterior limb of internal capsule. There are periventricular white matter hyperintensities also seen. (TR/TE: 3800/91 ms, 4 mm slice thickness, 320x270 matrix)

Click 30 year old male with Cerebrotendinous xanthomatosis (CTX). Axial FLAIR images of the brain show areas of high signal intensity in the cerebellum, predominantly in the bilateral dentate nucleus and the cerebellar white matter. There are also hyperintense lesions seen in the bilateral substantia nigra, bilateral globus pallidus and the posterior limb of internal capsule. There are periventricular white matter hyperintensities also seen. (TR/TE/TI: 7000/110/2000 ms, 5 mm slice thickness, 384x288 matrix.)